Last week, Apple updated its AirPort Utility, and the software contains references to a new fourth-generation Time Capsule and fifth-generation AirPort Extreme. No mention of a new Time Capsule was made in the latest FCC filings, but given that stock of the hardware has run dry along with AirPort base stations, it's a likely candidate for a refresh as well.

Various rumors have claimed that Apple may shift its base stations to run iOS. This transition could allow for more robust features, like print and media streaming services, integration with iCloud, and cached wireless software updates.